No, 9 is not a cube. The cube of 2 is 8 and the cube of 3 is 27. Since 9 doesn’t fall between these two cubes as a result of cubing a whole number, 9 isn’t a cube.
Class 8 Mathematics Ganita Prakash A Square and A Cube
Class 8 Mathematics Ganita Prakash Chapter 1 A Square and A Cube NCERT solutions
To check if 9 is a cube, compare it with nearby cube numbers.
2³ = 8
3³ = 27
Since 9 lies between 8 and 27 but isn’t the cube of any whole number, it cannot be a cube. Also, its prime factorisation is 3 × 3 and we cannot group the factors in threes. So, 9 is not a cube.
For more NCERT Solutions for Class 8 Mathematics Ganita Prakash Chapter 1 A Square and A Cube Extra Questions & Answer:
https://www.tiwariacademy.com/ncert-solutions/class-8/maths/ganita-prakash-chapter-1/